Alex Garland: The Beach [2007]

Late at night in a seedy hotel, Richard is drawn into a strange conversation with a fellow guest. Through a narrow strip of mosquito netting he hears for the first time of a secret beach, an island Garden of Eden, hidden somewhere in the scattered islands of a Thai marine park. The next morning, Richard finds a map pinned to his door, and the man who put it there has slashed his wrists. The challenge is irresistible, and Richard sets off on a perilous journey in search of Shangri-La.